I think you should consult the EV's handbook about long term storage. It's quite likely to be different depending on the models you have.
For some strange reason it seems that lithoum batteries for mobility scooters have a shorter life than usual. If you fully charge the battery and then let it stand for a week the battery is invariable flat and you are lucky if you can recover the battery. Most times it seems to involve a new battery.
I have the handbooks and they are quiet on long term storage, hence picking you guys brains
Thank you Clive All I was looking for was a guide as you have offered. I did read not to charge beyond 85% but nothing on leaving in storage
One of the concern's about EV's that has been raised in various motoring circles was how despite charging the EV's high voltage battery during long term storage, some people have found problems, because the cars 12v system battery had discharged.
There was no mention in my handbook about charging and storing a lithium battery. Basically all it said was when flat, recharge the battery. The charger is supposed to cut off charging once the lithium battery is charged up.
Our daughter has a Spear and Jackson cordless mower which must now be three years old. She used it last week to give a high level trim to the lawn. It lives in the garage so no heating. She charges it after each mowing then switches the charger off. That’s all she does.
I’ve got batteries for cordless tools and a Dyson cordless. I cannot recollect any manuals giving advice other than for recycling. Unlike cars none of my chargers apart from Dyson vacuum give any indication of where they are on the charging cycle. There are just a flashing light whilst charging which either goes out or goes to steady illumination. Are they 85% or 100% ? I know not. So I just do what I said in my initial response to Dustys question. And it seems to work for me. My iPhone has a more intelligent approach on its contactless charger, but again it doesn’t stay on for long periods. But it does show percentage charge and battery condition as a percentage of its new performance.
Precisely my point, though the OP's question was about EV's rather than hand tools and I suspect and hope the EV manufacturer does whatever is necessary to prevent their chargers from damaging the vehicle battery under all conditions.
It’s actually very hard for a charger to “know” the state of charge of a lithium battery it‘s charging with any accuracy. The voltage across the terminals doesn’t change very much over much of the charge/discharge cycle, Charging the thing to 100 percent is the only real way to establish a known state of charge. Systems can track discharge by monitoring the discharge current over time so once charged to 100 pc a reasonable state is of discharge prediction is possible in such intelligent systems. If the battery is never charged to 100 pc overall discharge logging gets less and less accurate with time as errors compound. Hence I occasionally charge the caravans li ions to 100 pc (at a time when I can use them to take that high voltage top off down ASAP) . Using a Victron battery monitor the charge state display becomes inaccurate over months if you don’t do this. But I don’t leave them at high charge states any more than I have to, time at max voltage ages Li cells,
When our Rio went in for a minor rear end repair the Repair Center had an area marked "EV quarantine area " where any incoming car EV, be it PHEV, or BEV would be taken. It was adjacent to the entry gates, and well separated from the normal accident damaged cars.
Vauxhall Zafiras we’re a major concern and even the first recall wasn’t 100% successful.However didn't the normal everyday Ford Kuga also have a problem with it bursting into flames? I am sure I have read of other brands of cars bursting into flames due to issues not related to the driver or mechanics.
I can't believe I am defending EVs. I need to go see the doctor on Tuesday.
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